Passing cum from person to person in such a way that the amount of cum increases.

Man cums in womans mouth, she spits cum into another womans mouth and a man cums in it too. She spits this into another womans mouth and so it goes on, back and forth till the last woman has to swallow a massive glop of cum. The "snowball" effect, see?

A very kinky sexual game when after someone has had sperm ejaculated into their mouth they hold it orally rather than spitting or swallowing, then french-kiss with their partner. It can also apply with two guys or a group with at least one guy involved (no duh).

How To Perform a Snow Ball On a Guy:
First the girl must trick the guy into giving him a blowjob (not hard to do). Once the guy jizzes in her mouth, she must keep it in her mouth until she goes back up to kiss the guy and spit it all back in his mouth.

1) My friend Ryan said to me one time, "Look. Once a girl does that to me, it's time to start smacking the bitch around."

Taking your man's cum in your mouth and not swallowing or spitting and deep kissing your man and letting him take some of his own cum back.

My Gay boyfriend and I just had sex and I took his load in my mouth and after sucking more cum from his spent cock He French kiss me taking some of it back. It was so damn hot thus snowballing with my man.